Optoelectronics Letters, Volume. 9, Issue 4, 293(2013)
Direct white-light from core-shell-like sphere with Sr3MgSi2O8: Eu2+, Mn2+coated on Sr2SiO4:Eu2+
A method of color mixture for white light is presented with Sr3MgSi2O8: Eu2+shell coated on Sr2SiO4:Eu2+core by spray pyrolysis procedure. Upon near ultraviolet (NUV) excitation, a 550 nm band emission of Eu2+ from core host combines with the simultaneous emissions of Eu2+at 457 nm and Mn2+ at 683 nm based on energy transfer in the shell lattice to generate warm white light with color rendering index (CRI) of 91. With such a core-shell-like structure, the re-absorption of blue light from shell layer can be effectively suppressed, and the chemical stability of the phosphor is verified experimentally to be superior to that of the Sr2SiO4:Eu2+. This new proposed phosphor provides great potential in the color mixture of blending-free phosphor converted white NUV light emitting diode (LED) devices.
Get Citation
Copy Citation Text
LI Jian, DENG Jia-chun, LU Qi-fei, WANG Da-jian. Direct white-light from core-shell-like sphere with Sr3MgSi2O8: Eu2+, Mn2+coated on Sr2SiO4:Eu2+[J]. Optoelectronics Letters, 2013, 9(4): 293
Received: Apr. 9, 2013
Accepted: --
Published Online: Oct. 12, 2017
The Author Email: Jia-chun DENG (jcdeng@tjut.edu.cn)